<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css">
        .grid {
            margin: auto;
            width: 530px;
            text-align: center;
        }

        .grid table {
            border-top: 1px solid #C2D89A;
            width: 100%;
            border-collapse: collapse;
        }

        .grid th,
        td {
            padding: 10;
            border: 1px dashed #F3DCAB;
            height: 35px;
            line-height: 35px;
        }

        .grid th {
            background-color: #F3DCAB;
        }

        .grid .book {
            padding-bottom: 10px;
            padding-top: 5px;
            background-color: #F3DCAB;
        }

        .grid .total {
            height: 30px;
            line-height: 30px;
            background-color: #F3DCAB;
            border-top: 1px solid #C2D89A;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="grid">
            <div>
                <h1>图书管理</h1>
                <div class="book">
                    <div>
                        <label for="id">
                            编号：
                        </label>
                        <input type="text" v-model="id" :disabled="isDisabled">
                        <label for="name">
                            名称：
                        </label>
                        <input type="text" v-model="name" v-focus>
                        <button @click="submitHandle">提交</button>
                    </div>
                </div>
            </div>
            <div class="total">
                <span>图书总数：</span>
                <span>{{books.length}}</span>
            </div>
            <table>
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>名称</th>
                        <th>时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="(item,index) in books" :key="item.id">
                        <td>{{item.id}}</td>
                        <td>{{item.name}}</td>
                        <td>{{item.date}}</td>
                        <td>
                            <a href="" @click.prevent="editHandle(item.id)">修改</a>
                            <span>|</span>
                            <a href="" @click.prevent="delHandle(index)">删除</a>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
    <script type="text/javascript" src="js/vue.js"></script>
    <script type="text/javascript">
        Vue.directive('focus', {
            inserted(el) {
                el.focus()
            }
        })
        var vm = new Vue({
            el: '#app',
            data: {
                name: '',
                id: '',
                isDisabled: false,

                books: [{
                    id: 1,
                    name: '三国演义',
                    date: ''
                }, {
                    id: 2,
                    name: '水浒传',
                    date: ''
                }, {
                    id: 3,
                    name: '红楼梦',
                    date: ''
                }, {
                    id: 4,
                    name: '西游记',
                    date: ''
                }]
            },
            methods: {
                //提交
                submitHandle() {
                    if (this.isDisabled) {
                        const index = this.books.findIndex(item => item.id === this.id)
                        // console.log(index);
                        this.books[index].name = this.name
                    } else {
                        this.books.push({
                            id: this.id,
                            name: this.name,
                            date: ''
                        })
                    }

                    //  复原
                    this.id = ''
                    this.name = ''
                    this.isDisabled = false


                },
                //修改
                editHandle(id) {
                    //   console.log(id);
                    //  console.log}('修改');

                    this.isDisabled = true
                    //如果找到数据中的id和传入的id值相等，那么返回该条数据的索引
                    //根据索引值拿到这条数据
                    //console.log(this.books);
                    const index = this.books.findIndex(item => item.id === id)
                    // console.log(index);
                    this.id = this.books[index].id
                    this.name = this.books[index].name

                },
                //删除功能
                    delHandle(index) {
                    this.books.splice(index, 1)
                }
            },
             watch(){
                 
             }
        });
    </script>
</body>

</html>